MUTILLA. 309 



gonal, the top of the length of the lower part bounded by the first recurrent and the 

 second transverse cubital nervures ; the third large, irregular, the bottom part as long 

 as the upper, the apex dilated in the middle. The first transverse cubital nervure 

 straight, oblique ; the bottom part of the third sinuate ; the upper nervure does not 

 reach to the apex of the wings, but the lower one does. The radial cellule is wider at 

 the base than at the apex ; the first abscissa straight, oblique, the apical abscissa curved. 

 The transverse median nervure is interstitial. The tegulse are moderately large, shining 

 at the apex, not produced behind, deep black, without a ridge ; in front of them is 

 a wide, deep depression. The femora are sparsely, the tibiae and tarsi more thickly, 

 covered with silvery hairs ; the calcaria are white. 



v 58. Mutilla catriona. 



Long. 9 millim. J . 



Bab. Mexico, Omilteme and Xautipa, both in Guerrero (R. H. Smith). 



Head narrower than the thorax, covered all over with a dense silvery pubescence, and 

 on the vertex with long silvery hair ; the clypeus raised in the middle into a wedge- 

 shaped projection, widest at the apex, the centre channelled ; the tips of the mandibles 

 ferruginous. Behind the eyes the head is well developed and roundly narrowed. The 

 scape of the antennas sparsely covered with rather long pale hair, the flagellum with a 

 brownish pile; the third joint is, if anything, longer than the fourth. The pronotum 

 coarsely punctured, covered with long white hair ; the base transverse, the sides oblique 

 and straight. The mesonotum and scutellum more coarsely punctured than the pro- 

 notum, covered with long white hair. The scutellum convex, rounded ; the furrow at 

 its base wide and deep ; the hair not longer than that on the mesonotum. The median 

 segment, except at the apex, densely covered with a white pubescence ; the apex reti- 

 culated ; the median area long and wide, tapering towards the apex. The middle of 

 the propleuraB depressed and irregularly striolate, the top rugose; the mesopleurse 

 punctured and covered with white hair ; the metapleurse reticulated, except in the 

 middle, obliquely. The tegulee are large, wide, not keeled ; obscurely punctured and 

 haired. The petiole is twice longer than wide; the base oblique, the other parts 

 covered with silvery pubescence. The second abdominal segment is strongly punctured, 

 with a wide apical band of silvery pubescence. The other segments finely punctured 

 at the apex, clothed, but not thickly, with white hair, and keeled down the centre, this 

 being also the case with the pygidium, which is more strongly punctured than the pre- 

 ceding segments ; the apex of the pygidium transverse. The first ventral segment is 

 produced into a stout tooth at the base ; it is slightly curved down the centre, the apex 

 oblique. The second ventral segment is strongly punctured and sparsely covered with 

 long hair. The other ventral segments are finely punctured at the apex; the hypo- 

 pygium is more strongly punctured and black. The legs are covered with white hair ; 



